The Pro board also comes with an external antenna connector to connect a U.FL connector compatible with 2.4GHz Wi-Fi antennas. With the ceramic antenna the D1 mini Pro should have better WiFi reception than its little brother. One is the ceramic antenna and the external antenna connector on the board. While the board shares the same pinout, USB-C connector and the LOLIN I2C Port they have a few technical differences. In previous versions all boards used a blue PCB, but with the latest release the Pro version got a green PCB. The most obvious visible difference between the two boards is the color. Important: all of the IO pins run at 3.3V. D1 mini Pro (v2.0.0) Wemos keeps the pin layout compatible. And with the latest board versions of the D1 mini (v4.0.0) vs. The pinouts of the D1 mini and the D1 mini Pro are identical, also the D1 mini shares the same pin layout. To fit everything on the board D1 mini Pro has grown a bit. The pro version also got a lithium battery interface charging interface and a LOLIN I2C Port. Both boards got USB type C connectors instead of micro USB. The Wemos D1 mini is now on version 4.0.0 and the Wemos D1 mini Pro on v2.0.0. It is so small it even fits into a small dollhouse Mini TV. I also like the board because it is little smaller than a classic Node MCU board. They provide 12 I/O pins - 11 digital and 1 analog input pin - enough for the most projects. The boards are equipped with a ESP-8266EX chip running at 80 or 160MHz, like many other Node MCU boards. I never used one of the light versions, most of the time you can get the D1 mini & D1 mini pro for almost identical prices at. The fourth board of the family is the is the D1 mini light. Some readers recently asked me about the Wemos D1 mini usage in my projects and how this board can be used with ESPHome.įor most of my Arduino & ESPHome projects I use a Wemos D1 mini (v3.1.0) or Wemos D1 mini Pro (v1.1.0) and recently the Wemos D1 mini v4.0.
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